info from callcentric on issue.
Thank you for performing the Xlite test for us. As you have confirmed that you do not seem to experience similar issues with Xlite, it seems that this issue is related to the PBX software itself, more specifically, it seems that the Axon and IVM Autoattendant software doesn’t send out RTP Keep Alive packets to our servers to prevent our servers from dropping the calls due to one way audio (we have tested the Axon software as well as the IVM software in our labs)- as we have mentioned previously we have also had experience similar issues that you are experiencing. Due to the limitation of the software itself as well as what is configurable, there is not much to suggest except that we recommend that you contact NCH support with regards to the issue at hand as it seems to be an issue with the software.